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Property, plant and equipment - Property, plant and equipment, Net (Details) - ARS ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Property, plant and equipment |  |  |
Property, plant and equipment | $ 28,538 | $ 23,165 | $ 17,963
Gross carrying value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment |  | 61,157 | 51,149
Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 28,538 | 23,165 |
PP&E without materials | Gross carrying value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 72,138 | 61,157 |
PP&E without materials | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 26,963 | 21,886 |
PP&E without materials | Accumulated impairment |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | (305) | (282) | (203)
Land, buildings and installations | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 1,576 | 1,310 |
Computer equipment and systems | Gross carrying value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 13,250 | 11,401 | 9,663
Computer equipment and systems | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 2,586 | 2,265 |
Switching and transmission equipment | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 6,576 | 5,614 |
Mobile network access and external wiring | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 11,256 | 9,078 |
Construction in progress | Gross carrying value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 4,138 | 2,915 | 3,015
Construction in progress | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 4,138 | 2,915 |
Other tangible assets | Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 831 | 704 |
Materials | Gross carrying value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 2,024 | 1,629 | 1,652
Materials | Accumulated impairment |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | $ (144) | $ (68) | $ (52)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_a&doctype=Standard -URIDate 2017-03-09 + Details
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